M PIC16C65A → PIC16C65B Migration DEVICE MIGRATIONS This document is intended to describe the functional differences and the electrical specification differences that are present when migrating from one device to the next. Note: This device has been designed to perform to the parameters of its data sheet. It has been tested to an electrical specification designed to determine its conformance with these parameters. Due to process differences in the manufacture of this device, this device may have different performance characteristics than its earlier version. These differences may cause this device to perform differently in your application than the earlier version of this device. Note: The user should verify that the device oscillator starts and performs as expected. Adjusting the loading capacitor values and/or the oscillator mode may be required. Table 1 shows the considerations that must be taken into account when migrating from the PIC16C65A to the PIC16C65B. TABLE 1: PIC16C65A → PIC16C65B DIFFERENCES Functional Differences due to Errata or Module Update No. 1 Module CCP Difference H/W S/W Prog. CCP Special Event Trigger clears Timer1. — Compare mode drives pin correctly. — Reading or writing TMR1H or TMR1L may affect TMR1H or TMR1L unexpectedly. — WDT/TMR0 prescaler assignment changes do not affect TMR0 count. — TMR2 SPI™ clock synchronized to start of SPI Transmission. — 6 Can now transmit multiple words in SPI mode. — 7 Supports all four SPI modes. (Now uses SSP vs BSSP module.) See SSP module in the PICmicro™ Mid-Range MCU Family Reference Manual (DS33023). — 8 I2C™ no longer generates ACK pulses when module is enabled. — Async receive errors due to BRGH setting corrected. — 2 3 Timers 4 5 SSP 9 USART 10 Oscillator TOST delay may be skipped when waking from SLEEP. 11 RESET 12 Short MCLR pulses may cause improper operation on the PIC16C65B. Operating voltage and frequency ranges have been redefined. — — — — — — — — — — — — — — — H/W - Issues may exist with regard to the application circuits. S/W - Issues may exist with regard to the user program. Prog. - Issues may exist when writing the program to the controller. 2001 Microchip Technology Inc. DS30322B-page 1 TABLE 2: Param No. ELECTRICAL SPECIFICATION DIFFERENCES PIC16C65A Symbol PIC16C65B Characteristic Unit Min Typ† Max Min Typ† Max 4.0 4.5 — 3.7 — — — — 4.0 — 6.0 5.5 — 4.3 14.0 4.0 4.0 VBOR 3.65 — — — — — — 5.5 5.5 5.5 4.35 8.5 V V V V V 1.25TCY + 30 40 1.25TCY + 30 40 100 — — — — — — — — — — ns ns ns ns ns 1.5TCY + 40 — — ns 100 — — ns — — — — 10 20 10 20 25 45 25 45 ns ns ns ns — — — — 50 100 ns ns 1.5TCY + 40 — — ns Core VDD D001 D001A D005 D150 VBOR VOD Supply Voltage XT, LP and RC mode HS mode BOR enabled (Note 1) Brown-out Reset Voltage Open Drain High Voltage on RA4 SSP in SPI mode 71 TscH 71A 72 TscL 72A 73 TdiV2scH TdiV2scL 73A T B2 B (Note 2) 74 TscH2diL TscL2diL 75 TdoR — — SCK input high Continuous TCY+20 time (Slave mode) Single Byte SCK input low Continuous TCY+20 — — time (Slave mode) Single Byte Setup time of SDI data input to 50 — — SCK edge Last clock edge of Byte1 to the — — — 1st clock edge of Byte2 Hold time of SDI data input to 50 — — SCK edge SDO data output PIC16CXX — 10 25 rise time PIC16LCXX — 10 25 78 TscR SCK output rise PIC16CXX time (Master PIC16LCXX mode) 80 TscH2doV SDO data output PIC16CXX — — 50 TscL2doV valid after SCK PIC16LCXX edge 83 TscH2ssH SS ↑ after SCK edge — — — TscL2ssH † Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters not tested. are for design guidance only and are Note 1: When BOR is enabled, the device will operate until VDD drops below VBOR. 2: Specification 73A is only required if specifications 71A and 72A are used. DS30322B-page 2 2001 Microchip Technology Inc. Note the following details of the code protection feature on PICmicro ® MCUs. • • • • • • The PICmicro family meets the specifications contained in the Microchip Data Sheet. Microchip believes that its family of PICmicro microcontrollers is one of the most secure products of its kind on the market today, when used in the intended manner and under normal conditions. There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the PICmicro microcontroller in a manner outside the operating specifications contained in the data sheet. The person doing so may be engaged in theft of intellectual property. Microchip is willing to work with the customer who is concerned about the integrity of their code. Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable”. Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our product. If you have any further questions about this matter, please contact the local sales office nearest to you. Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, PIC, PICmicro, PICMASTER, PICSTART, PRO MATE, KEELOQ, SEEVAL, MPLAB and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. Total Endurance, ICSP, In-Circuit Serial Programming, FilterLab, MXDEV, microID, FlexROM, fuzzyLAB, MPASM, MPLINK, MPLIB, PICC, PICDEM, PICDEM.net, ICEPIC, Migratable Memory, FanSense, ECONOMONITOR, Select Mode, dsPIC, rfPIC and microPort are trademarks of Microchip Technology Incorporated in the U.S.A. Serialized Quick Term Programming (SQTP) is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2001, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999. The Company’s quality system processes and procedures are QS-9000 compliant for its PICmicro ® 8-bit MCUs, KEELOQ® code hopping devices, Serial EEPROMs and microperipheral products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001 certified. 2001 Microchip Technology Inc. DS30322B - page 3 M WORLDWIDE SALES AND SERVICE AMERICAS ASIA/PACIFIC Japan Corporate Office Australia 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: http://www.microchip.com Microchip Technology Australia Pty Ltd Suite 22, 41 Rawson Street Epping 2121, NSW Australia Tel: 61-2-9868-6733 Fax: 61-2-9868-6755 Microchip Technology Japan K.K. Benex S-1 6F 3-18-20, Shinyokohama Kohoku-Ku, Yokohama-shi Kanagawa, 222-0033, Japan Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Rocky Mountain China - Beijing 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7966 Fax: 480-792-7456 Microchip Technology Consulting (Shanghai) Co., Ltd., Beijing Liaison Office Unit 915 Bei Hai Wan Tai Bldg. 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